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2. A. P. Belyaev, V. P. Rubets, V. V. Antipov, and V. V. Grishin, Fiz. Tekh. Poluprovodn. 42, 1309 (2008) [Semiconductors 42, 1282 (2008)].
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4. B. I. Shklovskii and F. L. Efros, Electronic Properties of Doped Semiconductors (Nauka, Moscow, 1979; Springer, New York, 1984).
5. Physics of II–VI Compounds, Ed. by A. N. Georgobiani and M. K. Sheinkman (Nauka, Moscow, 1986) [in Russian].